The Washington Post story cited five officials who had been briefed on interview requests from special counsel Robert Mueller with three top intelligence officials to see if Trump had attempted to obstruct justice.

Trump's tweets following the report appeared to confirm the investigation, but his lawyer said it only appeared that way because of the character limit on Twitter. Sekulow added that Trump is "very effective" with his use of social media.

"There's a limitation on Twitter, as we all know," Sekulow said. "The President's response was as it related to the Washington Post report. He cannot in a Twitter statement include all of that in there. ... That's it. Simple explanation."